GB1089683A - Production of sodium trimetaphosphate products - Google Patents
Production of sodium trimetaphosphate productsInfo
- Publication number
- GB1089683A GB1089683A GB51647/64A GB5164764A GB1089683A GB 1089683 A GB1089683 A GB 1089683A GB 51647/64 A GB51647/64 A GB 51647/64A GB 5164764 A GB5164764 A GB 5164764A GB 1089683 A GB1089683 A GB 1089683A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- mixture
- trimetaphosphate
- product
- h3po4
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/38—Condensed phosphates
- C01B25/44—Metaphosphates
- C01B25/445—Metaphosphates of alkali metals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
Na trimetaphosphate, or a mixture with other condensed phosphates, having a Na/P ratio below 1.45, is produced by maintaining a mixture of H3PO4 and a Na halide, having the required Na/P ratio, at 275-625 DEG C. without melting until the product contains more than 25% trimetaphosphate. Heating may be continued until at least 75% of the H3PO4 has reacted. A slurry of the acid and halide may be introduced into a rotary calciner containing a hot bed of particulate product, the weight of the slurry being at most half that of the bed, so that the temperature does not fall below 400 DEG C. The mixture is then heated at 400-625 DEG C. until reaction is complete, and the product is ground and screened if necessary and divided into 2 parts (e.g. 12:1), the larger of which is returned to the calciner. The process may be operated batchwise or continuously. NaCl, NaBr, NaI or NaF may be used, and the acid may be wet process acid (containing some HCl) from treating phosphate rock with HCl, or "superphosphoric" acid (P2O5 content up to 87%).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US332239A US3347627A (en) | 1963-12-20 | 1963-12-20 | Process for manufacturing sodium trimetaphosphate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1089683A true GB1089683A (en) | 1967-11-01 |
Family
ID=23297348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB51647/64A Expired GB1089683A (en) | 1963-12-20 | 1964-12-18 | Production of sodium trimetaphosphate products |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3347627A (en) |
| BE (1) | BE657323A (en) |
| DE (1) | DE1567678B1 (en) |
| ES (1) | ES307316A1 (en) |
| GB (1) | GB1089683A (en) |
| IL (1) | IL22598A (en) |
| NL (1) | NL6414612A (en) |
| NO (1) | NO115386B (en) |
| SE (1) | SE314660B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1095318A (en) * | 1964-07-14 | |||
| FI92820C (en) * | 1990-04-06 | 1995-01-10 | Kemira Oy | Process for the preparation of alkali metal phosphate |
| US6342284B1 (en) | 1997-08-21 | 2002-01-29 | United States Gysum Company | Gypsum-containing product having increased resistance to permanent deformation and method and composition for producing it |
| ID21641A (en) * | 1997-08-21 | 1999-07-08 | United States Gypsum Co | PRODUCTS CONTAINING GYPSUM BY IMPROVING RESISTANCE TO FIXED DEFORMATION AND METHODS AND COMPOSITION TO PRODUCE IT |
| US6632550B1 (en) | 1997-08-21 | 2003-10-14 | United States Gypsum Company | Gypsum-containing product having increased resistance to permanent deformation and method and composition for producing it |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE482190C (en) * | 1927-08-31 | 1929-09-09 | Hermann Oehme Dr | Production of alkali phosphates |
| US2280848A (en) * | 1939-12-15 | 1942-04-28 | Gordon R Pole | Making alkali metal phosphates |
| DE876399C (en) * | 1943-07-02 | 1953-05-11 | Knapsack Ag | Manufacture of alkali nitrimetaphosphate |
| US2874027A (en) * | 1956-05-07 | 1959-02-17 | Int Minerals & Chem Corp | Preparation of alkali metal phosphates |
| DE1258848B (en) * | 1959-01-22 | 1968-01-18 | Knapsack Ag | Process and device for the production of condensed alkali metal phosphates |
| GB970727A (en) * | 1961-04-25 | 1964-09-23 | Marchon Products Ltd | Manufacture of condensed phosphates |
| US3210154A (en) * | 1962-03-07 | 1965-10-05 | Stauffer Chemical Co | Molecularly dehydrated phosphates |
-
0
- BE BE657323D patent/BE657323A/xx unknown
-
1963
- 1963-12-20 US US332239A patent/US3347627A/en not_active Expired - Lifetime
-
1964
- 1964-12-10 IL IL22598A patent/IL22598A/en unknown
- 1964-12-10 NO NO155915A patent/NO115386B/no unknown
- 1964-12-15 NL NL6414612A patent/NL6414612A/xx unknown
- 1964-12-18 DE DE19641567678 patent/DE1567678B1/en active Pending
- 1964-12-18 GB GB51647/64A patent/GB1089683A/en not_active Expired
- 1964-12-19 SE SE15435/64A patent/SE314660B/xx unknown
- 1964-12-19 ES ES0307316A patent/ES307316A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3347627A (en) | 1967-10-17 |
| BE657323A (en) | |
| DE1567678B1 (en) | 1971-05-27 |
| IL22598A (en) | 1968-04-25 |
| ES307316A1 (en) | 1965-05-16 |
| SE314660B (en) | 1969-09-15 |
| NL6414612A (en) | 1965-06-21 |
| NO115386B (en) | 1968-09-30 |
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